Expression Blend has released a preview version of Blend that addresses some of the missing features of the version of Expression Blend that ships with VS 2012.   Here is a download to the preview version that has a lot of the features that were missing in the shipped version.  My suggestion is that anyone that works with Xaml and VS 2012 download this version of Blend  http://www.microsoft.com/en-us/download/details.aspx?id=30702